Would love to meet and "pay you a beer" personally, not only via donation. But seems too far and does not fit in my time schedule

About database you seem to be right. A removal and fresh start looks better.
But now all my caches/notes/history are gone. Have to investigate and find a solution somehow ...

Nevertheless I had a crash:
downloaded some overview (about 8 caches), then downloaded detail for one cache and switched tabs from logs to description or vice versa and suddenly UI hanged and short time later UI disappeared. Process python was still running.
Next time I will use the github for reporting